Hi Beachman, It depends on were you are going if you are just going up to tip up the Development road They will be fine, but If you are doing the OTL and a few other rougher tracks, You could change them to a better class of tire depends on how much money you want to spend and if you are on a budget and if your trailer tires and rims are the same as your Tug if so just take another spare, I always take two or three spares, But I just run cheap Chinese A/T tires that will handle 80psi but have them around 40 to 50 psi loaded in them on my Tug and boat trailer on the trip up the black top, But I only go up to penny but once I hit the dirt on the way up near Laura I drop them to 28psi for the trip up to Weipa, once near penny I drop them down to 13 to 14psi and run around penny the tracks around penny and back into Weipa for tucker and in the 4 weeks never had a flat, This year will be 6 years in a row going there, But If I only need a couple of tires I put two new ones on the front of the tug, Then I put the front on the back of the 4wd and I put the the just legal ones off the back of the 4wd on the trailer if that makes sense, Craig